The following provide basic guidelines
for the materials composing O-rings supplied by Superior Seals &
Service, Inc. These are only GUIDELINES. We urge you to perform tests
on the o-rings you place into service to ensure they meet your specific
requirement. If you have any questions, please consult our factory.

Aflas
This polymer has similar media compatibilities to EPR. However, it is
compatible with and resistant to degradation due to contact with petroleum
products.

In Typical Applications O-rings Come Into Contact
With: Chemicals, Heat, Fuels, Diester Lubricants, Halogenated Hydrocarbons
(above 212°F).
Neoprene (Chloroprene)
This polymer is good in oil, ozone, and weathering. It is excellent in
refrigerants such as Freon, but not good in phosphate esters, keytones,
or brake fluids.
Basic Temperature Service Range: - 65°F (-54°C) to 250°F
( 121°C)
In Typical Applications O-rings Come Into Contact With: Freon,
Air Conditioning Refigerants, Oils.
Silicone
This polymer has both excellent heat and low temperature capabilities.
This material should be used as a static seal, because it has poor tensile
and tear strength.
Basic Temperature Service Range: - 80°F (-112°C) to 400°F
(204°C)
In Typical Applications O-rings Come Into Contact With: Dry Heat,
Oxygen, Medical, Low Temperatures.
TFE Encapsulated (PTFE-FE) Silicone or Viton Core
These seals combine the chemical qualities of PTFE with the compression
set of the rubber core encapsulated.
Basic Temperature Service Range: - Established by the rubber core.
In Typical Applications O-rings Come Into Contact With: Heat, Chemicals